Aluminum foil bag is widely intended for packing coffee beans as of high barrier property for the package, and it will keep the freshnsss roasted beans as long as possible.
As a manufacturer for coffee bags located in Qingdao, China for many years, in this post, we are going to explain how the aluminum foil coffee bags is produced, and hope it will be helpful for those customers who would like to source reliable packages printer.
Aluminum foil
Aluminum foil is considered as the ideal packaging material in flexible packaging, as it is with the best barrier performance (usually evaluated in WVTR and OTR data) among all the flexible packaging materials, you can check the barrier characteristics in below table.
However, as aluminum foil is without heat seal property and easy to wrinkles under outside forces, so the aluminum foil will have to be laminate with other base film, like BOPP film, PET film, LDPE film etc, to make it well functioned to form into final packages.
With WVTR and OTR value nearly to 0, we can consider the foil laminates which include aluminum foil is of supreme barrier property. Below are some common foil structure used for coffee packages, with some difference in package property even though, which we will explain in details.
- (Matte)BOPP/Aluminum Foil/PE
- PET/Aluminum Foil/PE
- PET/Aluminum FOil/PET/PE
- PET/Aluminum FOil/PA/PE
Generally, we advise to adapt PET film for the outside print substrate, as it is of high mechanical strength, more size stability, high temperature resistance, and good printability. You may learn more here.
then we come into the procedures of the produce for coffee bag.
Bag type of aluminum foil coffee bag
Before any produce, the first step is to confirm the bag type you prefer.The coffee bag needs to standup, and usually the bagtype we choose as below.
- Bottom Gusset Coffee Bag
- Side Gusset Quad Seal Coffee Bag
- Flat Bottom Coffee Bag (also known as box bottom coffee bag)
We are capable of producing all these 3 bags, with daily output 500,000~600,000 pieces, should be able to realize prompt delivery for your order.
Confirm on coffee bag dimension
The package size should be suitable for the beans volume, like 250g, 12oz, 454g etc, and different customers may have its own preference for the filled level, so the dimension for the coffee bag may vary. You may reach us for testing the package size with certain volume of beans, and check the final filled effect.
Artwork Design Filling
When the bag type and size are well confirmed, we are obliged to provide design template for the filling of your artwork. Your artwork should be forwarded to us for final review in PSD or Illutrator files. We need to realize the best effect for your artwork onto the package, and in some cases, we will help to improve the design and try to realize your order with best effect , and the same time, at lower cost.
Cylinder Making
Afterward, print cylinders will be made against your artwork, and once the print cylinders are finished, it can not be regressed. That means, if even you would like to change a single text in the artwork design, it can not be done, unless the cylinders are aborted. So, we would confirm again with the customers on any new artwork before it moves to the next step.
Printing
We realize the artwork print in gravure print up to 10 colors, with matte lacquer finish available.
Upon our experience, gravure printing is able to realize more vivid print effect than flexo print.
Lamination
We are realizing the multlayer lamination by solvent free lamination and dry lamination, as you can see below video.
Bag-Making
An elegant coffee bag is finished with serious bag-making craftsmanship. You can read more about the excellent performance of 12oz box bottom coffee bag here. http://www.valuepackaging.cn/12oz-premium-quality-matte-white-box-bottom-coffee-bag/
Welding of degassing valve
The degassing valve will have to be welded onto the coffee package in a smoothe and neat way, no wrinkles, no contaminations, and no heat damage.
Generally that’s the basic procedures to produce an aluminum foil coffee bag, and if you have any questions, you may reach us for further assistance.